Taxon Report

Haplodontium tehamense (Showers) J.R. Spence

Lassen Peak copper moss

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Taxon Summary

Haplodontium tehamense, commonly known as Lassen Peak copper moss, is a moss in the Mniaceae that is found only in California. It occurs within Alpine boulder and rock field (mesic, rock, soil, and volcanic), growing at elevations from 2500 to 2800 meters. Haplodontium tehamense is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

  Classification
Scientific Name:
 Haplodontium tehamense (Showers) J.R. Spence
Common Name:
 Lassen Peak copper moss
Family: Mniaceae
Element Code: NBMUS4Q030
USDA Plants Symbol:
Synonyms/Other Names:
  • Mielichhoferia tehamensis

Ecology and Life History
Lifeform: moss
Blooming Period:
Elevation: 2500-2800 (8205-9185)
General Habitats: Alpine boulder and rock field
Microhabitat:
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 1B.3
Global Rank: G2
State Rank:
 S2
State List: None
Fed List: None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB
Total Occurrences: 5
Element Occurrence Ranks:
   Excellent (A) 0
   Good (B) 0
   Fair (C) 0
   Poor (D) 0
   None (X) 0
   Unknown (U) 5

Location
California Endemic:  True
California Counties and Islands: Name (Code)
Shasta (SHA), Tehama (TEH)
Quads: Name (Quad Code)
Lassen Peak (4012145), Reading Peak (4012144), West Prospect Peak (4012154)

Threat List Data from the CNDDB

Threat List Total: 0
EOs with Threat Listed: Total EOs % of EOs
0 %

 

Notes
Known only from Lassen Volcanic NP. See The Bryologist 83:365-366 (1980) for original description.
Threats:
Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 November 2025].